Lime-light fixture.



No. 788,795. PATENTED MAY 2, 1905 A. 0. ROEBUGK.

LIME LIGHT FIXTURE.

APPLIUATION FILED MAY 16.1904.

Patented May 2, 1905.

PATENT OFFICE.

ALVAI-I (I. ROEBUOK, OF CHICAGO, ILLINOIS.

LIME-"LIGHT FIXTURE.

SPECIFICATION forming part of Letters Patent No. 788,795, dated. May 2,1905.

Application filed May 16, 1904. Serial No. 208,158.

To all whrmt it may concern:

Be it known that I, ALVAH C. RonBUoK, a citizen of the United States ofAmerica, and a resident of Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in Lime-Light Fixtures, of which the following is a specification.

The present invention relates to that type of lime-light fixtures inwhich means is provided for effecting rotary, vertical, and horizontaladjustments of the lime or other like incandescing stick or block withrelation to the burner-nozzle; and the present improve ment has for itsobject, first, to provide a simple and efficient structural formationand combination of parts whereby the abovementioned rotary, vertical,and horizontal adjustments of the incandescing lime or like block withrelation to the gas-discharge nozzle or jet is manually attained in aready'and convenient manner; second, to provide a simple and efficientattachment of the et or nozzle to the supply trunk of the fixture,whereby a substantial and gas-tight connection is had and which at thesame time permits of a ready detachment and replacement of the jet ornozzle in the usual cleaning and like operations, all as willhereinafter more fully appear and be more particularlypointed out in theclaims.

In the accompanying drawings, illustrative of the present invention,Figure l is a side elevation, of the present lime-light fixture. Fig. 2is a plan view of the same. Fig. 3 is an enlarged detail central sectionat line a: r, Fig. 2, illustrating the connection of the nozzle to thesupply-trunk. Fig. 1 is a simi lar view illustrating the adjustablecarriage and its connected parts.

Similar numerals of reference indicate like parts in the several views.

Referring to the drawings, 1. and 2 represent the usual pair of paralleltubes, connected at their forward end to the supply trunk or head 3 andprovided at their rear ends with counterpart attaching-necks l for theusual flexible hose connections by which the different gases employedare supplied to the burner jet or nozzle 5 of the fixture.

6 is a tubular supporting-bracket ada ted I to fit the usual stationaryupright stan ard by which a lime-light fixture is supported in avertically-adjustable manner in the lampcasing of a stereopticon orother like apparatus.

7 is a horizontal extension of the bracket 6, formed with guide-sleevesthrough which the aforesaid pair of tubes 1 and 2 pass and havehorizontal adjustment, the parts being secured at the desired adjustmentby the usual set-screw 8.

9 is a longitudinal feed-screw turning in a scren threaded socket in thedownward extension 10 of the supporting-bracket 6 aforesaid, so thatwith a rotation of such screw a positive horizontal movement of the samewill take place. At its forward end such screw 9 has operativeconnection with the carriage, hereinafter described, by means of anenlarged head 11, engaging in a correspondingly-formed recess in adepending extension of said carriage, as shown in Figs. 1 and 4. At itsrear end such screw 9 is provided with a hand-wheel '12 for convenientmanual operation. In the present improve ment the feed-screw 9 is of atubular form with its tubular bore adapted to receive theoperating-shaft of the mechanism by which rotary and vertical movementsare imparted to the basket or carrier of the lime blocks, as hereinaftermore particularly described.

18 is a carriage having lateral tubular extensions embracing the pair oftubes 1 and 2, so as to be guided horizontally thereon.

14 is a vertical scrcw-threaded rod fitting a screw-threaded orifice inthe carriage 13 and provided at its upper end with a basket or holder 15for the block of lime or other ma terial employed in lime-lights.

16 is a bevel-pinion arranged near the lower end of the rod 14 andhaving operative engagement therewith by means of a radial pin 17,engaging in a longitudinal groove 18 in said rod to afford a connectionwhich will impose rotation in unison upon the pinion and rod and at thesame time permit of a vertical rectilinear movement of said rod.

19 is a bevel-pinion meshing with and driving the aforesaid pinion 16.Such pinion 19 is carried by a horizontal shaft 20, having itsjournal-bearing in the bore of the feed-screw 9 aforesaid and as shownin Fi s. 1, 2, and 4, with its rear end projecting bac of the hand-Wheel 12 of said screw and provided with a hand-wheel 21 for convenientmanual operation.

The described arrangement of the tubular feed-screw 9 and the shaft20 isadapted to afford a simple and effective means for attaining theregulation and adjustment of the lime-body with relation to the burner-jet ina very convenient manner to the operator.

Another part of the present invention involves a simple and efficientconnection of the jet-or nozzle5 to the supply head or trunk 3 inamanner to permit ofa readydetachment and replacementof the said nozzleand at the same time provide a gas-tight joint between the parts whenassembled. Such connection comprises a construction as follows: 22 isthe central vertical bore of the supply- .trunk 3 for the reception ofthe tubular attaching-neckof the nozzle 5. Such bore is preferablycounterbored at its upper and lower ends to .form annularbearing-shoulders 23, having a square form in cross-section,asillustratedin Fig. 4. 24 is the tubular attaching-neck of the nozzleor jet 5,

which in the present construction is formed witha cone-shapedenlargement 25, where it connects with the body portion of the nozzle,and which cone-shaped enlargement is adapted to bear against the uppershoulder 23 of the aforesaid bore of the su ply-trunk to afford a tightjoint between t e parts. 26 is a headed attaching-screw,the-screw-threaded shank of which screws into the screw-threaded lowerend of the tubularneck24 aforesaid. Such screw is formed with acone-shaped portion between its head and shank, which is adapted .tobear against the lower shoulder 23-of the boreaforesaid of thesupply-trunk to afford a tight joint at the under side of said trunk.

Having thus fully described my said invention, what I claim as new, anddesire to secure by Letters Patent, is

1. In a lime-light fixture, the combination of a burner-nozzle, asupply-trunk, a pair of horizontal supply-pipes connecting with saidtrunk, a carriage moving on said pipes, a tubular feed-screw connectedto said carriage and adapted to impart horizontal adjustment to thesame,a vertical screw moving in said carriage and provided withalime-block carrier at its upper end, a pair of bevel-gears havingoperative connection with said screw, an operatingshaft passing throughthe tubular feed-screw aforesaid and having operative connection withone of the bevel-gears aforesaid, and hand-wheels at the rear ends ofthe feed-screw and the operating-shaft for convenient manual rotation ofthe same, substantially as set forth.

2. In a lime-light fixture, the combination of a supply-trunk formedwith a vertical bore ending in an annular and angular rim or shoulder attop, a burner jet'or nozzle having an attaching-neck and a conicalenlargement at the junction of said neck with the body of the nozzle,the said conical enlargement having bearing on the annular rim orshoulder aforesaid of the vertical bore of the supply-trunk to form aclose joint, and means for securing the nozzle in place, substantiallyas set forth.

3. In a lime-light fixture, the combination of a supply-trunk formedwith a vertical bore ending in annular and angular rims or shoulders attop, a burner jet or nozzle having an attaching-neck and a conicalenlargement at the junction of said neck with the body of the nozzle,the said conical enlargement having bearing on the :upperannular rim orshoulder aforesaid of the vertical bore of the supply-trunk to form aclose joint, and a headed attaching-screw screwing into the lower end oftheattaching-neck aforesaid, and provided with a conical portionadjacent to its head and having bearing on the lower rim of the verticalbore-of the supplytrunk to form a close joint, substantially as setforth.

4. In a lime-light fixture, the combination of a supply-trunk formedwith a vertical bore ending at its upper and lower ends in counterboresand at bottom of said counterbores in annular and angular rims orshoulders, a burner jet or nozzle having an attachingneck and a conicalenlargement at the junction-of said neck with the body of thenozzle, thesaid conical enlargement having bearing on the upper annular shoulderaforesaid of the supply-trunk, and a headed attachingscrew screwing intothe lower end of the attaching-neck aforesaid, and provided with aconical portion adjacent to its head and having bearing on the lowerannular shoulder aforesaid of the supplytrunk, substantially as setforth.

Signed at Chicago, Illinois, this 13th day of May, 1904.

ALVAH O. ROEBUCK.

Witnesses:

ROBERT BURNS, M. H. HoLMEs.

IIC

